Roll-Up
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See: Roll-Up, Drill-Through, OLAP.
References
1999
- (Zaiane, 1999) ⇒ Osmar Zaiane. (1999). “Glossary of Data Mining Terms." University of Alberta, Computing Science CMPUT-690: Principles of Knowledge Discovery in Databases.
- QUOTE: Roll-up: Also Drill-Up. An OLAP function. It is a specific analytical technique whereby the user navigates among levels of data ranging from the most detailed (down) to the most summarized (up) along a concept hierarchy. For example, when viewing the data for the city of Toronto, a roll-up operation in the Location dimension would display Ontario (i.e. the direct concept parent of "Toronto" in the, the concept hierarchy of the dimension "Location"). A further roll-up on Ontario would display data for Canada.